Definitely clickbaity, as the title is intentionally misleading. (Read it as "The literary device named 'nonsense' is something that Shakespeare was genius at".) This is definitely a case where HN should change the title.
However, one nonsense claim to watch out for is the claim that Shakespeare invented 1700 new words. Shakespeare is the first recorded use of many words, but that doesn't mean he invented them, it means we care a lot about Shakespeare and preserved his writing better than others'.